The challenge comes from thinking ahead. The resource demands increase exponentially and the more rooms you have of a certain type, the more storage you have of that resource. However, building too many resource rooms decreases your income since the percentage of buggy rooms decreases, but having a high percentage of buggy rooms increases the chance of a glitch, which can decrease up to 75% of a certain resource. I do agree, that you really need to pay attention to the game. Perhaps a bit too much, but it is the post-apocalypse and you're trying to survive so the game should be a bit tense.